i think you're right Ole. With your information, I found a similar radiator with an upturned lower outlet.Could be out of a truck.
That could be tricky to decode, different manufacturers often would make the same part and thus different number codes. Also they used to have a trade school were i live and they would rebuild radiators, they had a big OK stamp that they would punch into the radiators that were worth rebuilding. Didn't look like the one on yours thought, just a thought. I guess you would have to find a radiator historian to find more info.^^^That's understood but what about the letter stamping on the tanks and the tags on the core ?